android 2.2应用程序无法在android 4.0中运行

Question

我正在研究android 2.2 froyo应用程序.当我运行我的应用程序android 2.2,3.0那个时候完美运行.但是当我在Android 4.0上运行时,那时我给出了一个错误.很遗憾,应用程序已停止.请帮助我如何解决错误.

08-03 16:19:36.602: E/AndroidRuntime(581): FATAL EXCEPTION: main
08-03 16:19:36.602: E/AndroidRuntime(581): java.lang.IllegalArgumentException: Window type can not be changed after the window is added.
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.os.Parcel.readException(Parcel.java:1331)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.os.Parcel.readException(Parcel.java:1281)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.view.IWindowSession$Stub$Proxy.relayout(IWindowSession.java:634)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.view.ViewRootImpl.relayoutWindow(ViewRootImpl.java:3586)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1185)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.os.Looper.loop(Looper.java:137)
08-03 16:19:36.602: E/AndroidRuntime(581):  at android.app.ActivityThread.main(ActivityThread.java:4424)
08-03 16:19:36.602: E/AndroidRuntime(581):  at java.lang.reflect.Method.invokeNative(Native Method)
08-03 16:19:36.602: E/AndroidRuntime(581):  at java.lang.reflect.Method.invoke(Method.java:511)
08-03 16:19:36.602: E/AndroidRuntime(581):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-03 16:19:36.602: E/AndroidRuntime(581):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-03 16:19:36.602: E/AndroidRuntime(581):  at dalvik.system.NativeStart.main(Native Method)

Logcat
错误就像:不幸的是app已停止

Answer 1

检查您的活动/活动中是否包含此代码

  @Override
    public void onAttachedToWindow()
    {  
        this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
        super.onAttachedToWindow();  
    }

这是Android早期版本中的一个安全漏洞,可用于将用户锁定到应用程序中并阻止他使用"主页"按钮.这已在Android 4及更高版本上修复,使用此功能将显示您看到的错误.